Composite roll.



G. BAEHR.

COMPOSITE ROLL.

APPLICATION FILED SEPT. 25. me.

Lgy, Patented Dec. 31, 1918.

'enenen Barum, or r1'r'rsnuiacf'i1,.` PENNsYLvANIA.

COMPOSITE ROLL.

j Lessines.

To all whom t 'may concer/n.: x Be it known that I, GEORGE BAEHR, a resident of Pittsburgh, in the county of Alle- `.the metal being worked. Further objects sired.V .f

are to provide means for holding the facing members rigidly in position on the roll, to prevent their working loose because of the expansion of parts under heat, and to provide` simple and ecient means for placing theiinterchangeable parts in position, securing them there, and removing them when de- These and other objects are attained by a construction of parts, lan embodiment of which is shown in the accompanying drawings. f

Referring to the drawings, plan view of one form of my roll,

Figure 1 is a removed from the bearing; Fig. 2 is anvaxial vertical l at' section; Fig. 8 is a vertical section on the line 3-3 of Fig. 2; and Figs. 4, 5, 6, 7, and 8 show modied forms of facing members.

1t is dicult in making rolls for steel mills to secure theA proper hardness of surface,

with the requisite toughness throughout.

Further, there is difficulty in forming the grooves in the surface of large rolls, and especially is this true where deformed bars, as used for reinforcing concrete, are to be rolled, and other irregular shapes. Also, it is necessary to machine the `surface of cast rolls, and this necessitates the handling of a heavy roll in the lathe. `When the surface of solid rolls becomes Worn, they must be reground, or machined, vand this produces a smaller roll. v

The resent invention overcomes man of I these diiculties. The mold body 1 may e a single steel casting, having the usual 4necks 2`and wabblers 3 at each end thereof for lengagement with a proper driving mechanism. At one end of the roll body a xed collar 4 is provided having an undercut por- A tion 5 forming an annular inclined recess 6. At the other' end the roll body is threaded A for some distance. The ooves 7 for shaping the metal being wor ed are preferably Specification of Letters Patent.

lfatented Dec. 331, 1918.

Applicationy led September 25, 1916. Serial No. 122,081.

formed by a pair of facing members 8 and 9 which are placed side by side against the roll body,.and are of circular form adapted to fit on the body member, or spindle, ll, having abutting faces on their adjoining sides, and their other sides being inclined. These circular members are each into a plurality of sections, which are slightly spaced apart at their ends so that when the facing overhanging collars below described the tendency is to wedge said members against' the roll body without contactof the ends of 'adjoining sections. A slidable collar member, or ring, 10, having an undercut face adapted to coperate with the inclined side of facing member 9, is able on the mold body. purposes better to use parallel pairs of facing members, cut away at their joint to form a groove, it is obvious that the groove may be formed in the middle of the facing member, and only single members laid end to end used to make the shaping groove on the.roll surface, and that more than one groove may be so formed in the surface of a single' member. (See Figs. 7 and 8 of the drawings.)

A ring 11, with vertical faces is adapted to slide onto the mold body andto abut against the 'outer straight face of the retaining rin 10. rlhis ring 11 is .made of some meta having a co-eiiicient ofexpansion which 'is high in comparison with the ferrous metals used in the other parts, as for example, bronze. Removable undercut rings 12 and 13, having their undercut sidesopposed, and their other sides vertical, are provided to retain a second series of facing members 8& and 9&in a manner similar. to that used for retaining the members 8 and 9. 'A threaded nut member 14 is adapted to screw on the main body of the roll, and to drive all of the movable parts above noted toward the fixed collar 4.

Although, as shown, the roll comprises a series of two sets `of facing members, Le., two grooves, may have only one groove2 or more than two,v

if desired.- My construction allowsY the' roll Apreferably divided longitudinally mov- While it is for most members areengaged by the f it will be obvious that the roll to be built up to suit the particular use de- A sired, with a wide variety of forms.

n assembling, the sectionsof the facing member 8 are placed in position, and forced under the .overhanging portion 5, the sections of member 9 are then placed in the position shown, and the over-hanging 10 is slipped over the inclined face of member 9. The expansion ring 11 is next moved to the position shown, also the overhanging ring 12, the sectional facing members 8aL are placed in position thereunder, also the sections of member 9n are sety in position and retained by slipping on the overhanging ring 13. After this the nut 14 is turned on until it makes close engagement with the ring 13. Further travel of the nut clamps all of the parts 'between itself and the overhanging fixed shoulder 5, and the undercut rings 10, 12 and 13 tend to ride upon the inclined facing members, and to its working loose when the roll is in opera-v tion. ln order that the nut 1K1 may be driven tightly into position, and tightened at any desired time, a brake band 16 is provided extending partially around a circular collar on the nut, and having the terminal screw member 17 and hand wheel 18 for the purpose of drawing -the brake, as will be obvious. "This permits the tightening of the roll parts without stopping the operation, 'since the roll is rotating clockwise, and by retarding, by means of brake band 16, the threaded/clamping member 14, that member tends to screw onto the threaded portionof the roll, and hence to move inward from the.-

end thereof, to drive all of the clamping parts into more rigid relative relation.

Although, as above stated, it` will be plain that the members 8 and 9 might be combined, and the groove formed in the center of sections of the facing members, itis preferable to build up'that facing of ytwo members in parallel sections, having the grooves formed 'at their joint. This, because, by so forming the parts, the groove may be readily formed by machining olf the edges of the sections, and much more economically and easily than by channeling out a groove through the mid` dleof a single member, j f

lt will be best in certain cases to make the sections of facing members shorter than those shown in Fig-3. This is particularly true when itis desired lto adapt them for rolling deformed bars, and to cast the facing members with a supplementary groove in the grooved face, so as to form a ralsed gurerunning along each side of the bars. For 1nstance,'where a serpentine form is being rolled, or.a Wrform, the facing members may be cast of suchv length that each of them contains one unit of the shape. trated in Figs. 4C, 5 and. 6.

This is illusz having` a xed undercut collar at one end,

The construction shown permits the rigid .joining of all the parts, since the undercut 11, when the roll is heated by use, expands more than the other members, -and so tends to take up any looseness that might otherwise develop. Also, when the roll is allowed to cool, this ring shrinks, and the parts, and nut, are loosened so that they may be easily removed. j

y This method of building up a roll allows the use of'a main body` member of any desired material, such as cast steel, and the use of facin members of more expensive and less ductile steel or iron, such as tool steel, chrome-steel, or other hard` alloys. lt permits the `machining of parts of comparatively small'f weight," which may be more readily ma'nipul atedduring the finishing of composite rolls of-this form permits the" use of a standard body member, with a great variety of facing members, thus doing away with the necessity and expense ofhaving a great number of rolls on hand, the only clif-4 ference in which is in the particular groove out therein. With the present invention the and shaping process.; v Furthermore, the use same roll body can be left .in position, and

simply the facing members changedto conform to a variety of shapes.

When rolls become worn, itis necessary to re-face them. .Ordinarily th 1 ca'nronly be done by reducing the surface, causing a larger roove. But with my invention, by

machining ed' the abutting edges of my facing members having a groove between, .the two move together, the depth of the groove is reduced, and it may be resurfaced, without making an ultimately deeper groove.

' The lost material is taken up by further travel of the nut 14.

vIt will be apparent that the use of the built-up facing members, having the groove at the joints of parallel members will be particularly valuable where deformed bars, such as those used in concrete construction, are to be rolled, since the various cuts necessary can be very easily made in the edges of the two members forming the groove. v

@ther objects and advantages of the invention will be apparent to those familiar with the art. l claim 1. A composite roll comprising a spindle, i

and undercut collars slidable thereon, sec tional facing .members arranged in parallel pairs forming a groove between the pairs, and means to move the collars longitudinally on the spindle to engage `inclinededges 'of the facingmembers.

2. A composite rollcomprisinga spindle sectional facing members in pairs With a groove between 'retained against the body member by said collar and by a slidable undercut ring adapted to engage the facing members, and a screw member threaded on the spindle and adapted to drive the collars together to lock the facing members against the spindle.

3. A composite roll composed of a spindle K and facing members thereon having incline edges engaged byv undercut rings, detachable means for moving the rings together on the spindle, and a ring on the spindle made of a metal having a comparatively high co-eficient of expansion.

A. ln a composite roll, the combination of a spindle, facing members therefor, means to clamp said facing members against the spindle, and an expansion member adapted to tighten the clamping means when the roll is heated.

5. A composite roll comprising a spindle, facing members therefor, undercut rings slidable on the spindle and adapted to engage inclined edges of the facing members, a ring of metal of comparatively high coefficient of expansion, a fixed collar at one end of the spindle, and a member threaded on the other'end of the sp-indle adapted to clamp the facing and ring members against the fixed collar.

6. A composite roll comprising a spindle, an undercut abutment at one end, sectional facing members, undercut rings to clamp the facing members against the spindle, a threaded member at the other end of the spindle, and a brake on said threaded member, whereby to tighten it against the facing parts Without stopping the roll.

ln testimony whereof, l have hereunto set 4@ my hand.

' GEORGE BAEHR.

Witnesses GLENN H. LERESGHE, A. E. JOHNSON. 

